A load of 800 N is lifted using a block and tackle having 5 pulleys. If the applied effort is 200 N, calculate i. Mechanical advantage

Question

A load of 800 N is lifted using a block and tackle having 5 pulleys. If the applied effort is 200 N, calculate
i. Mechanical advantage
ii. Velocity ratio
iii. Efficiency
iv. Output work if load is lifted 5m high.
v. Input work

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RobertKer 2 months 2021-07-29T07:50:47+00:00 2 Answers 20 views 0

Answers ( )

    0
    2021-07-29T07:52:15+00:00

    Explanation:

    Load=800N

    Effort=200N

    1. Mechanical Advantage = LOAD/EFFORT

    = 800N/200N

    = 4

    2 Velocity Ratio = no. Of pulleys =5

    3. Efficiency = Mechanical advantage / velocity ratio × 100%

    = (4/5)×100%

    =80%

    4. output work= load×load distance

    = 800N × 5m

    = 4 × 1000J

    5. Efficiency = (output work/input work) ×100%

    Or, 80% = (4000J/input work) ×100%

    Or, 80%/100% = 4000J/inputwork

    Or, 4/5 = 4000J/inputwork

    Or, input work =4000J × 5/4

    Input work = 5×1000J

    I hope it helped! 😉

    0
    2021-07-29T07:52:17+00:00

    Answer:

    I got the same answers.

    Explanation:

    I agree with the first person respone.

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